Multiple switch for telephones.



No. 790,814. PATENTED MAY 23, 1905. G. V. BEAVER! MULTIPLE SWITCH FOR TBLEPHON'ES.

APPLICATION FILED DEO.7, 1901.

No. -79o,s14.

v UNITED STATES Patented May 23, 1905.

CHARLES V. BEAVER, OF ANITA, IOWA.

MULTIPLE SWITCH FOR TEL EPHONES.

SPECIFICATION formingpart of Letters Patent No. 790,814, dated May 23, 1905.

Application filed December 7, 1901. Serial No. 85,029.

To all whom it may concern.-

Be it known that 1, CHARLES V. BEAVER, a citizen of the United States, residing at Anita, in the county of Cass and State of Iowa, have invented a new and useful Multiple Switch for Telephones, of which the following is a specification. Y w

My invention relates to telephone circuits and apparatus, and has for its object to provide a single local telephone set with means to connect it at will with either one of two telephone-circuits and at the same time to connect the other telephone-circuit with a suitable auxiliary signal device, so that both of said circuits are in condition to call the local telephone at all times. i

To this end the invention comprises a local telephone set, two separate line-circuits, an auxiliary signal or extension-bell, and a switch adapted to connect the local set with either one of said line-circuits and the other linecircuit with the extension-bell, so that the local station is always in condition to receive a call from either lineat alltimes.

The invention is illustrated in the accompanying drawings, in whichv v Figure 1 is a rear elevation of my improved switch mechanism with the various instruments connected thereto conventionally illustrated. Fig. 2 is a front elevation of the same. Fig. 3 is a detail view of the movable member of the switch.

Referring to the drawings, the numeral 10 designates a switchboard adapted to be secured to the wall or any other suitable support, to which is connected a local telephone set, comprising a call-bell or other audible signal B, a transmitter T, a receiver R, and the usual accessories of a telephone-station.

Pivoted at its upper end to the board 10 is a switch-lever 12, of wood, hard rubber, or other suitable insulating material, to which bar is secured a series of four metallic strips 13, 14, 15, and 16, which constitute duplex contacts extending laterally from each side of said lever. Connected with 'the respective strips 13, 14, 15, and 16 are four conductorwires 19, 21, 17, and 18, which run along the rear of said lever and pass to the back side of the board 10 by way of an opening y, lo-

the call-bell B, transmitter T, and receiver R.

On the front of board 10, to the right andleft of the contacts on the switch-lever 12, are mounted two sets of fixed contacts in groups of four, (designated by the numerals 27 to 30 and 23 to 26, inclusive,) each contact comprising a metal strip secured rigidly to the board by a screwand-nut or similar fastening, each of which fastening devices projects through the board and affords an appropriate connection between its corresponding contact-strip and a circuit-wire on the rear of the board.

Two wires 45 and 46, which form the conductors of one telephone circuit or party-line, are connected to binding-posts 37 and 40 on the board, from which .posts wires 38 and 41 lead to contacts 28 and 27 respectively. A second telephone circuit or party-line 47 and 48 isconnected to posts 32 and 34 and thence by wires 31 and 35 to fixed contacts 24 and 23. The right and left hand sets of contacts are connected by suitable cross-wires as follows: 23 to 29, 24 to 30, 25 to 27, and 26 to 28. A lightning arrester L, connected to ground G, is connected by wire 50 to contact 29, thence by cross-connecting wire to contact 23.

It will be seen that by the above-described arrangement two telephone circuits or partylines are permanently connected to the board, and either may be connected to the local set by moving switch-lever 12 to engage the contacts 13, 14, 15, and 16 with the fixed contacts 27 30 or 23 26, to the right and left, respectively, and in either event the other circuit or party-line will be connected through the auxiliary signal or extension-bell B, so

. that either line may call the local station.

When the switch-lever 12 occupies the righthand position, a signal from line 45 46 will be received upon call-bell B over the following circuit: wire 45, post 37, lead 38, contact 28,

contact 14 on lever 12, wire 17 to bell B, wire 18, contact 13, fixed contact 27, lead 41, post 40, line-wire 46, back to the calling-station. It will be obvious, of course, that the calling subscriber can then communicate with the local subscriber in the usuflway without changing the switch. If, howeverga call be sent in over line 47 48 when the switch is in its righthand position, the signal will be received on the extension-bell B over the following circuit: wire 47, post 32, lead 31, contact 24, cross-connector to contact 30, contact 16, wire 19 to bell B, wire 21 to contact 15, fixed contact 29, cross-connector, to contact 23, lead 35, post 34, circuit-wire 48, to the callingstation. Upon receiving the call on extension-bell B the local subscriber shifts the switch-lever to the left-hand position, and the local set is thereby connected directly with the calling-station on line 47 48 over the following circuit: line-wire 47, post 32, lead 31, contact 24, to lever-contact 14, wire 17 to local set R T, thence by wire 18 to lever-con tact 13, contact 23, lead 35, post 34, circuit 48, back to the calling-station. If the switch be left in this latter position, a call from line 47 and 48 will be received upon call-bell B of the local set, and communication can be had without changing switch-lever 12, and a call from line 45 46 will be indicated on extension bell B, and switch-lever 12 must be shifted to its other or right-hand position to establish communication between the local and the calling subscriber.

In any event a call received on local bell B indicates that the switch is in proper position for communication, while a call on the exten sion-bell signifies that the switch must be shifted to its opposite position to connect the local and the calling-subscribers instruments.

It is to be noted that my improved switch may be used to connect the party-lines with the local with facility, whether the individual lines be complete metallic circuits, grounded circuits, or an indiscriminate arrangement of both types, and that the apparatus is so simple in construction and operation that it may be installed and used by any one possessing ordinary skill and intelligence.

Having thus described my invention, what I claim is 1. In a telephone-switch, the combination of a board, a switch-lever pivoted to the board, four wires carried by and extending along said lever from a point near its pivot, four contacts carried by the lever and to which the said wires are connected, and two series of four fixed line-wire contacts cooperating respectively with the contacts on the lever as the latter is moved to the right and left, two of the said four wires being connected to an auxiliary signal and the other two being included in a local telephone set; substantially as described.

2. In a telephone-switch, the combination of a board, aswitch-lever pivoted to the board, four wires carried by and extending along said lever on the rear side thereof from a point near its pivot and passing through an aperture in said board to the rear side of the board, four contacts carried by the lever and to which the said wires are connected, two series of four fixed line-wire contacts cooperat ing respectively with the contacts on the lever as the latter is moved to the right and left, two of the aforesaid four wires being connected at the rear of the board to the binding-posts of an auxiliary signal and the other two being included in a local telephone set; substantially as described.

3. In a telephone-switch, the combination of a board, line-wire binding-posts and auxiliary-signal binding-posts located at one end of the board, aswitch-lever pivoted at the same end of the board, two series of four fixed linewire contacts located at the opposite end of the board to the right and left respectively of the switch-lever, four contacts carried by the switch-lever and cooperating with the linewire contacts, and four wires connected to the switch-lever contacts and extending along the lever, two of said wires being connected to the auxiliary signal and the other two to a local telephone set; substantially as described.

CHARLES V. BEAVER.

Witnesses:

R. H. ORWIG, THOMAS Gr. ORWIG. 

